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Nature Research, Scientific Reports, 1(5), 2015

DOI: 10.1038/srep10855

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Electron spin coherence near room temperature in magnetic quantum dots

Journal article published in 2015 by Fabrizio Turyanska L. Wilman Fielding A. J. Fay M. W. Granwehr J. Patanè A. Moro ORCID, Lyudmila Turyanska, James Wilman, Alistair J. Fielding, Michael W. Fay, Josef Granwehr, Amalia Patanè
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractWe report on an example of confined magnetic ions with long spin coherence near room temperature. This was achieved by confining single Mn2+ spins in colloidal semiconductor quantum dots (QDs) and by dispersing the QDs in a proton-spin free matrix. The controlled suppression of Mn–Mn interactions and minimization of Mn–nuclear spin dipolar interactions result in unprecedentedly long phase memory (TM ~ 8 μs) and spin–lattice relaxation (T1 ~ 10 ms) time constants for Mn2+ ions at T = 4.5 K and in electron spin coherence observable near room temperature (TM ~ 1 μs).